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JOSEPH CORDUAN or BROOKLYN, new YORK.

Letters Patent No. 76,165, dated Jlfarch 31, 1868,

IMPROVED LUBRIGATING-GOMPOSITION.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, JOSEPH GORD'UAN, of the city of Brooklyn, in the county of Kings, and State of New York, have inyented certain new and useful Improvements in Lubricators for Journal-Bearings; and do hereby declare the following to be a full, clear, and exact description thereof.

My. improvements relate to compositions which will be less afl'eeted byheat, and better lubricators than any heretofore used. Paper-pulp and things of that class hat re been employed for this purpose, but they are objectionable, because more easily affected by heat than the principal substance I propose adopting.

Asbestos, which is my principal substance, is a poor conductor of heat, and tends, when mixed with a glutinous material, such as glue, to act as a good lubricator, and with the addition of plumbago, or other known lubricating-substances, I get even better results. When-mixed with plumbago, I prefer the following proportions, viz, two parts of asbestos to one of plumbago, with sufiicient glutinous material to form a solid but pliable mass. Still these proportions can be varied, and yet have an excellent lubricator. The mass, whether of asbestos and the glutinous material alone, or combined with the plumbago, can be made either in a pulp or solid form, as the construction of the bearing where it is to be used may require. For instance, in an axle-box upon a car, it might be more economical and serviceable by forming it into sheets or pieces, the width and length of the slide, bearing, or recess in which it is to be inserted, being fastened therein according to usual and wellknown means. Again, it might be placed in a'pulp-form round about thejournal. This pulp-form is probably more economical in cases of shafting, and with the ordinary construction of machinery.

.What I claim as new, and desire to secure by Letters Patent, is-

1. The use of asbestos, substantially as and for the purpose described; and

2. The use'of asbestos in combination with plumbago or other known lnbfloating-substances, being mixed with a glutinous material, substantially as and for the purpose described.

JOSEPH OORDUAN.

Witnesses EDWARD LYON, Uta,

JonN MGINTYRE. 

